JP4823939B2 - Ground vibration isolation method - Google Patents

Ground vibration isolation method Download PDF

Info

Publication number
JP4823939B2
JP4823939B2 JP2007034317A JP2007034317A JP4823939B2 JP 4823939 B2 JP4823939 B2 JP 4823939B2 JP 2007034317 A JP2007034317 A JP 2007034317A JP 2007034317 A JP2007034317 A JP 2007034317A JP 4823939 B2 JP4823939 B2 JP 4823939B2
Authority
JP
Japan
Prior art keywords
bag
ground
deflated
cushion
vibration isolation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2007034317A
Other languages
Japanese (ja)
Other versions
JP2008196251A (en
Inventor
修二 磯谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fudo Tetra Corp
Original Assignee
Fudo Tetra Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fudo Tetra Corp filed Critical Fudo Tetra Corp
Priority to JP2007034317A priority Critical patent/JP4823939B2/en
Publication of JP2008196251A publication Critical patent/JP2008196251A/en
Application granted granted Critical
Publication of JP4823939B2 publication Critical patent/JP4823939B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Description

本発明は、例えば、列車、自動車及び振動機械等を振源とする振動を遮断する地盤振動遮断工法に関するものである。   The present invention relates to a ground vibration isolation method that isolates vibration using, for example, a train, an automobile, and a vibration machine as a vibration source.

この種の地盤振動遮断工法で構築される地盤振動遮断構造体としては、特開2006−132142に、地盤中に可撓性の袋体を設置して該地盤の変位を抑制するようにしたもので、前記地盤中の上下方向に積層状態で埋設され、それぞれ内部に流体が充填された可撓性の複数の袋体と、この複数の袋体の圧力をそれぞれ調整可能な圧力調整手段と、を備えた地盤変位抑制装置が開示されている。また、特開2006−118209に、複数のクッション体を地盤中に埋設した地盤振動遮断構造において、内部に流体が充填された前記複数のクッション体を前記地盤中の上下方向に埋設し、この埋設の深度或いは前記地盤中の圧力に従って前記各クッション体の内部圧力を調整自在にした地盤振動遮断構造が開示されている。これらの地盤振動遮断構造は、土水圧の変動に拘わらずほぼ同じ体積を保持して地盤中に配置されるため、地盤の上下方向の全域において所望の地盤振動遮断効果が得られる。
特開2006−132142(請求項1) 特開2006−118209(請求項2)
As a ground vibration isolation structure constructed by this type of ground vibration isolation method, Japanese Patent Application Laid-Open No. 2006-132142 has a flexible bag body installed in the ground to suppress displacement of the ground. And a plurality of flexible bags embedded in a stacked state in the vertical direction in the ground, each filled with fluid, and pressure adjusting means capable of adjusting the pressure of each of the plurality of bags, There is disclosed a ground displacement suppressing device including Further, in Japanese Patent Application Laid-Open No. 2006-118209, in a ground vibration isolation structure in which a plurality of cushion bodies are embedded in the ground, the plurality of cushion bodies filled with fluid are embedded in the vertical direction in the ground. There is disclosed a ground vibration isolation structure in which the internal pressure of each cushion body can be adjusted according to the depth of the ground or the pressure in the ground. Since these ground vibration isolation structures are arranged in the ground while maintaining substantially the same volume regardless of fluctuations in soil water pressure, a desired ground vibration isolation effect can be obtained in the entire area in the vertical direction of the ground.
JP-A-2006-132142 (Claim 1) JP-A-2006-118209 (Claim 2)

しかしながら、従来の地盤振動遮断構造体を構築する工法は、可撓性の袋体やクッション体を、予め、地上で膨らませてその後地中に設置するため、例えば、設置位置の範囲を泥土化する際、施工費用が嵩むことがあった。また、ガス封入も工場で行なうため、膨れた状態で現場まで運搬しなければならず、運搬費も高くなっていた。また、気中でガスを封入するため、内圧を一定以上高くできず、設置深度にも限界があった。例えば設置深度が100mの場合、土の密度を1.5とした場合、100m×1.5/10=15kg/cmで、圧力容器の扱いとなり、法規制により気中では取り扱えないという問題がある。 However, the conventional method for constructing a ground vibration isolation structure is to inflate a flexible bag or cushion in advance on the ground and then install it in the ground. In some cases, the construction cost increased. In addition, since gas filling is also performed at the factory, it has to be transported to the site in an inflated state, and the transportation cost is high. Moreover, since the gas is sealed in the air, the internal pressure cannot be increased beyond a certain level, and the installation depth is limited. For example, when the installation depth is 100 m, when the soil density is 1.5, 100 m × 1.5 / 10 = 15 kg / cm 2 , it is handled as a pressure vessel and cannot be handled in the air due to legal regulations. is there.

従って、本発明の目的は、高い耐圧強度の袋状クッション体は不要であり、運搬費用や施工費用が嵩むことがなく、施工効率に優れる地盤振動遮断工法を提供することにある。   Accordingly, an object of the present invention is to provide a ground vibration isolation method that is excellent in construction efficiency without requiring a bag-shaped cushion body with high pressure resistance and without increasing transportation costs and construction costs.

かかる実用において、本発明者らは鋭意検討を行った結果、貫入体に装着された萎んだ複数の袋状クッション体を、該貫入体と共に地盤中に連行する第1工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填又は充満させる第2工程と、該貫入体を地上に引上げて膨らませた複数の袋状クッション体を地盤中に置き去りにする第3工程を行なう地盤振動遮断工法であれば、袋状クッション体は、高い耐圧強度のものは不要であり、運搬費用や施工費用が嵩むことがなく、施工効率に優れることを見出し、本発明を完成するに至った。   In such practical use, as a result of intensive studies, the present inventors have conducted a first step of entraining a plurality of deflated bag-like cushions attached to the penetration body into the ground together with the penetration body, and a plurality of The second step of filling or filling the inside of the deflated bag-like cushion body with the fluid, and the third step of leaving the plurality of bag-like cushion bodies inflated by pulling up the penetration body on the ground If it is a vibration isolation method, the bag-like cushion body is not required to have a high pressure strength, and it has been found that the transportation cost and the construction cost are not increased and the construction efficiency is excellent, and the present invention has been completed. .

すなわち、本発明は、複数の袋状クッション体を地盤中に埋設する工法であって、貫入体に装着された萎んだ複数の袋状クッション体を、該貫入体と共に地盤中に連行する第1工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる第2工程と、該貫入体を地上に引上げて膨らませた複数の袋状クッション体を地盤中に置き去りにする第3工程を行なう工法であって、前記地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる方法は、前記袋状クッション体の各袋部を深度方向に連通する逆止弁付き連通孔又は連通短管に、気体封止用配管を、その先端が最深部の袋部内に位置するように串刺し状に設置し、該気体封止用配管を該最深部の袋部から上方の袋部へ順に移動させながら、各袋部に所定の圧となる気体を封入していくことを特徴とする地盤振動遮断工法を提供するものである。 That is, the present invention is a method of embedding a plurality of bag-like cushion bodies in the ground, and is a first method in which a plurality of deflated bag-like cushion bodies attached to the penetration body are entrained in the ground together with the penetration body. a step, first to the second step causes the internal filling fluid into a plurality of deflated bag-like cushion body in the ground, a plurality of bag-like cushion member inflated Te pulling the through inclusion bodies on the ground left behind in the ground A method of performing three steps, in which a plurality of deflated bag-like cushion bodies in the ground are filled with fluid, with a check valve that communicates each bag portion of the bag-like cushion body in the depth direction. In the communication hole or the short communication tube, the gas sealing pipe is installed in a skewer shape so that the tip is located in the deepest bag part, and the gas sealing pipe is located above the deepest bag part. While moving in order to the bag part, each bag part has a predetermined pressure. It is intended to provide a ground vibration isolation method characterized by going encapsulating body.

また、本発明は、複数の袋状クッション体を地盤中に埋設する工法であって、貫入体に装着された萎んだ複数の袋状クッション体を、該貫入体と共に地盤中に連行する第1工程と、該貫入体を地上に引上げて複数の萎んだ袋状クッション体を地盤中に置き去りにする第2A工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる第3A工程を行なう工法であって、前記地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる方法は、前記袋状クッション体の各袋部を深度方向に連通する逆止弁付き連通孔又は連通短管に、気体封止用配管を、その先端が最深部の袋部内に位置するように串刺し状に設置し、該気体封止用配管を該最深部の袋部から上方の袋部へ順に移動させながら、各袋部に所定の圧となる気体を封入していく地盤振動遮断工法を提供するものである。 Further, the present invention is a method of embedding a plurality of bag-like cushion bodies in the ground, wherein the plurality of deflated bag-like cushion bodies attached to the penetration body are entrained in the ground together with the penetration body. A step 2A, the second A step of lifting the penetrating body to the ground and leaving a plurality of deflated bag-like cushion bodies in the ground, and a step of filling a plurality of deflated bag-shaped cushion bodies in the ground with fluid. A method of performing a 3A process, wherein a method of filling a plurality of deflated bag-shaped cushion bodies in the ground with a fluid includes a check valve that communicates each bag portion of the bag-shaped cushion bodies in the depth direction. In the communication hole or the short communication tube, the gas sealing pipe is installed in a skewer shape so that the tip is located in the deepest bag part, and the gas sealing pipe is located above the deepest bag part. Gas that has a predetermined pressure in each bag part while moving in order to the bag part Ru der provides a sealed to go ground vibration isolation method.

また、本発明は、前記複数の袋状クッション体が埋設される予定地盤を、予め泥水地盤とする前工程を更に行なう前記地盤振動遮断工法を提供するものである。   Moreover, this invention provides the said ground vibration isolation | separation construction method which further performs the pre-process which makes the planned ground in which the said some bag-shaped cushion body is embed | buried in advance as a muddy ground.

また、本発明は、前記萎んだ袋状クッション体は、2枚のシートを袋部となる部分を残して溶着したシート状物である前記地盤振動遮断工法を提供するものである。   Further, the present invention provides the ground vibration isolation method, wherein the deflated bag-like cushion body is a sheet-like material in which two sheets are welded leaving a portion that becomes a bag portion.

また、本発明は、前記貫入体は、貫入フレームか、あるいはケーシングである前記地盤振動遮断工法を提供するものである。   Further, the present invention provides the ground vibration isolation method, wherein the penetrating body is a penetrating frame or a casing.

また、本発明は、前記貫入体はケーシングであって、前記第1工程は、前記萎んだ袋状クッション体を包む外袋を該ケーシングに装着し、該萎んだ袋状クッション体を包む外袋ごと、地盤中に連行する前記地盤振動遮断工法を提供するものである。 In the present invention, the penetrating body is a casing, and the first step is to attach an outer bag that wraps the deflated bag-shaped cushion body to the casing, and to wrap the deflated bag-shaped cushion body. The ground vibration isolation method is taken along with the ground.

本発明によれば、袋状クッション体の素材として、耐圧強度の高いものは不要であり、運搬費用や施工費用が嵩むことがなく、施工効率に優れる。また、泥水地盤は軟弱地盤であり、貫入体を地中に建て込み易い。また、2枚のシートから複数の袋状クッション体を容易に製作することができる。また、深度方向に対して直交する方向に横長の袋状クッション体を深度方向に複数個積層して配列させる場合、従来のシート状遮水板地中構築工法で用いる貫入フレームを同様の施工方法で使用でき、深度方向に縦長の袋状クッション体を深度方向に複数個積層して配列させる場合、パックドレーン工法で用いるケーシングを同様の施工方法で使用できる。また、外袋は、ケーシングを引上げる際、袋状クッション体とケーシング内面との接触をさせないため、袋状クッション体を防護し、地中に建て込まれた後は、土水圧に耐え得る補強材として機能する。また、串刺し状の気体封止用配管を使用すれば、袋状クッション体の各袋部を、埋設深度の土水圧に応じた内圧に容易に設定することができる。   According to the present invention, a material having a high pressure resistance is not necessary as a material for the bag-shaped cushion body, and the transportation cost and the construction cost are not increased, and the construction efficiency is excellent. In addition, the muddy ground is a soft ground, and it is easy to build an intrusion into the ground. In addition, a plurality of bag-like cushion bodies can be easily manufactured from two sheets. In addition, when a plurality of horizontally long bag-like cushion bodies are stacked and arranged in the depth direction in a direction perpendicular to the depth direction, a similar construction method is used for the penetration frame used in the conventional construction method for underground sheet-shaped impermeable board When a plurality of vertically long bag-like cushion bodies are stacked in the depth direction and arranged in the depth direction, the casing used in the packed drain method can be used in the same construction method. In addition, the outer bag prevents the bag-shaped cushion body from contacting the inner surface of the casing when the casing is pulled up. Functions as a material. Moreover, if the skewered gas sealing pipe is used, each bag portion of the bag-like cushion body can be easily set to an internal pressure corresponding to the soil water pressure at the embedding depth.

次ぎに、本発明の実施の形態における地盤振動遮断工法を説明する。先ず、第1工程は、貫入体に装着された萎んだ複数の袋状クッション体(以下、「萎んだクッション体」とも言う。)を、該貫入体と共に地盤中に連行する工程である。   Next, the ground vibration isolation method according to the embodiment of the present invention will be described. First, the first step is a step of entraining a plurality of deflated bag-like cushion bodies (hereinafter also referred to as “deflated cushion bodies”) attached to the penetration body together with the penetration body into the ground.

第1工程において、萎んだクッション体は、各々が独立した複数の袋部が上下方向(深度方向)に積層されたものが使用できる。袋部の形状としては、特に制限されず、横長状の袋部、縦長状の袋部、矩形状の袋部あるいは不定形状の袋部が挙げられるが、この中、横長状の袋部又は縦長状の袋部が作製の容易さと用途に応じた遮断壁を構築することができる点で好ましい。深度方向に対して直交する方向に横長の袋状クッション体が深度方向に複数個積層して配列される横置きの(横置きの形態)場合、効率よく連続壁を構築することができる。また、深度方向に縦長の袋状クッション体が深度方向に複数個積層して配列される縦置き(縦置きの形態)の場合、施工区域を予め泥水地盤とする前工法を必ずしも必要としない点で好適である。   In the first step, the deflated cushion body may be formed by stacking a plurality of independent bag portions in the vertical direction (depth direction). The shape of the bag portion is not particularly limited, and includes a horizontally long bag portion, a vertically long bag portion, a rectangular bag portion, or an indefinitely shaped bag portion. Among these, a horizontally long bag portion or a vertically long bag portion is exemplified. The shape of the bag-like bag portion is preferable in that a barrier wall can be constructed according to ease of manufacture and use. In the case of horizontal installation (horizontal installation mode) in which a plurality of horizontally long bag-like cushion bodies are stacked and arranged in the depth direction in a direction orthogonal to the depth direction, a continuous wall can be constructed efficiently. In addition, in the case of vertical installation (vertical installation form) in which a plurality of vertically long bag-shaped cushion bodies are stacked in the depth direction and arranged in the depth direction, a pre-construction method in which the construction area is previously muddy ground is not necessarily required. It is suitable.

萎んだクッション体の作製方法としては、2枚のシートを袋部となる部分を残して溶着したシート状物とする方法または各々の袋部を予め作製しておき、その後、各袋部をバンドなどの接合部材で連結する方法などが挙げられる。この中、2枚のシートを袋部となる部分を残して溶着したシート状物とする方法が作製が容易である点で好ましい。   As a method for producing a deflated cushion body, a method of making two sheets of sheet-like products in which a portion to become a bag portion is left or the respective bag portions are prepared in advance, and then each bag portion is banded. The method of connecting with joining members, such as, etc. are mentioned. Among these, a method of forming a sheet-like product in which two sheets are welded leaving a portion that becomes a bag portion is preferable in terms of easy production.

図1は横置きの形態、図2は縦置きの説明図であり、それぞれ(A)は正面図、(B)は側面図である。萎んだクッション体1は、2枚のシートを袋部11となる部分を残して溶着したシート状物であり、中空部を有する複数の袋部11、上下端部12、両側端部13及び仕切り部16を有する。また、萎んだクッション体1は、各袋部11を深度方向に連通する逆止弁付き連通短管14を備える。連通短管14は、各袋部11に流体を供給する供給口であり、供給された流体の逆流を防止するものである。従って、連通短管14に替えて、上下端部12及び仕切り部16に形成される逆止弁付き連通孔であってもよい。また、連通短管又は連通孔は、上記形態の他、例えば各袋部11を繋げるものではなく、両側端部13の一方にキャップ付きの連通孔を各袋部11毎に個別に形成されるものであってもよい(図5参照)。逆止弁付き連通短管14の場合、流体を袋部11に供給する際、流体封止用配管15を、その先端151が最深部の袋部11a内に位置するように串刺し状に設置して、第1工程において使用される。なお、図2においては、流体封止用配管15の記載を省略した。また、個別のキャップ付きの連通孔は、それぞれに流体封止用配管15が接続されて使用される。   FIG. 1 is a horizontal configuration, FIG. 2 is an explanatory diagram of vertical installation, (A) is a front view, and (B) is a side view. The deflated cushion body 1 is a sheet-like product in which two sheets are welded so as to leave a portion that becomes a bag portion 11, and includes a plurality of bag portions 11, upper and lower end portions 12, side end portions 13 and partitions having hollow portions. Part 16. Further, the deflated cushion body 1 includes a communication short tube 14 with a check valve that communicates each bag portion 11 in the depth direction. The communication short pipe 14 is a supply port that supplies fluid to each bag portion 11 and prevents backflow of the supplied fluid. Therefore, instead of the communication short pipe 14, a communication hole with a check valve formed in the upper and lower end portions 12 and the partition portion 16 may be used. In addition to the above-described form, the communication short tube or the communication hole does not connect the bag portions 11, for example, and a communication hole with a cap is formed individually for each bag portion 11 at one of the side end portions 13. It may be a thing (refer FIG. 5). In the case of the communication short pipe 14 with a check valve, when supplying the fluid to the bag portion 11, the fluid sealing pipe 15 is installed in a skewer shape so that the tip 151 is located in the deepest bag portion 11a. Used in the first step. In FIG. 2, the description of the fluid sealing pipe 15 is omitted. In addition, each of the communication holes with caps is used with a fluid sealing pipe 15 connected thereto.

萎んだクッション体1の素材としては、可撓性且つ不透水性の材料であり、例えばポリエチレン、ポリエチレンにアルミニウムをラミネートしたものなどが使用される。萎んだクッション体1は、地中に連行された後、膨らませるため、深い深度においても土水圧と内圧の差圧以上の耐圧性であればよく、従来の地上で膨らませて地中に設置する場合に比べて、遥かに低い耐圧性のものが使用できる。   The material of the deflated cushion body 1 is a flexible and impermeable material, such as polyethylene, polyethylene laminated with aluminum, or the like. Since the deflated cushion body 1 is inflated after being taken into the ground, the cushion body 1 only needs to have a pressure resistance equal to or higher than the differential pressure between the soil water pressure and the internal pressure even at a deep depth. Compared to the case, a material having a much lower pressure resistance can be used.

本発明の萎んだクッション体1には、更に地中に設置された後、袋部11の内圧をモニタリングするための配管が接続される接続口を有していてもよい。また、本発明の萎んだクッション体1の各袋部11は、すべてが独立である必要はなく、例えば2つ以上の袋部11が連通孔で接続されていてもよい。これにより、連通された各袋部11の内圧は同じとなり、モニタリング配管の設置数を減らすことができる。一方、連通孔で接続する袋部11が多過ぎると、深度方向に異なる土水圧の影響を受け、深い深度部分の袋部11の体積が収縮する恐れがある。また、本発明の萎んだクッション体1に、予め、アンカーを設置しておいてもよい。これにより設置安定性が向上する。また、本発明の萎んだクッション体1には、貫入体に装着するためのフックなどの係止部が形成されていてもよい。   The deflated cushion body 1 of the present invention may further have a connection port to which a pipe for monitoring the internal pressure of the bag portion 11 is connected after being installed in the ground. Moreover, not all the bag parts 11 of the deflated cushion body 1 of the present invention need to be independent. For example, two or more bag parts 11 may be connected to each other through a communication hole. Thereby, the internal pressure of each bag part 11 connected becomes the same, and it can reduce the installation number of monitoring piping. On the other hand, if there are too many bag portions 11 connected by the communication holes, the volume of the bag portion 11 in the deep depth portion may shrink due to the influence of soil water pressure that varies in the depth direction. Moreover, you may install the anchor in advance in the cushion body 1 which withered this invention. Thereby, installation stability improves. In addition, the deflated cushion body 1 of the present invention may be formed with a locking portion such as a hook for mounting on the penetrating body.

萎んだクッション体1は、貫入体に装着される。貫入体は、貫入フレーム又はケーシングである。貫入フレームやケーシングは、ベースマシンにより起立支持されたリーダーに沿って昇降されるか、あるいはクレーンによる吊り込みにより昇降される。クレーンによる吊り込みは、地盤が軟弱地盤の場合に好適である。横置き形態の場合、従来のシート状遮水板地中構築工法で用いる貫入フレームを同様の施工方法で使用でき、縦置き形態の場合、従来のパックドレーン工法で用いるケーシングを同様の施工方法で使用できる。   The deflated cushion body 1 is attached to the penetrating body. The penetrating body is a penetrating frame or casing. The penetrating frame and the casing are moved up and down along a leader that is erected and supported by the base machine, or lifted by a crane. Suspension by a crane is suitable when the ground is soft ground. In the case of horizontal installation, the penetration frame used in the conventional sheet-shaped impermeable board construction method can be used in the same construction method, and in the case of vertical installation, the casing used in the conventional packed drain method is used in the same construction method. Can be used.

貫入フレームは、例えば図1(A)のシート状物(萎んだクッション体1)をその大きさを保持したまま、添装できるものである。   The penetration frame can be attached, for example, while maintaining the size of the sheet-like material (the deflated cushion body 1) of FIG.

ケーシングは、例えば図2(A)のシート状物(萎んだクッション体1)をその大きさを保持したまま、中空内に装着できるものである。ケーシングの中空部の内径が小さ過ぎると、袋部11が膨らんだ後、ケーシングを引き抜く際、ケーシングから膨らんだクッション体が抜け難くなり、また、ケーシングの中空部の内径が大き過ぎると、地中への貫入抵抗が大きくなる。   For example, the casing can be mounted in the hollow while maintaining the size of the sheet-like material (the deflated cushion body 1) of FIG. If the inner diameter of the hollow portion of the casing is too small, the cushion body that has swollen from the casing becomes difficult to pull out when the casing 11 is pulled out after the bag portion 11 has expanded, and if the inner diameter of the hollow portion of the casing is too large, The penetration resistance to the is increased.

次ぎに、図2のシート状物をケーシングに装着して施工する方法を図3を参照して説明する。図3の(A)から(E)に向けて順に工程が進む。また、図3(C)〜(E)では、図面の簡略のため、ベースマシンの記載を省略した。   Next, a method of installing the sheet-like material of FIG. 2 on the casing will be described with reference to FIG. The process proceeds in order from (A) to (E) in FIG. Further, in FIGS. 3C to 3E, the description of the base machine is omitted for simplification of the drawing.

ケーシング21は、ベースマシン22により起立支持されたリーダー23に沿って昇降される昇降機26に連結されている。先ず、一端が巻き上げ機24に接続された巻き上げロープ25の他端をケーシング21の中空部を通して、ケーシング21の下端から頭だしをする。この巻上げロープの端部251に、図2に示す袋部11が萎んだシート状物(萎んだ袋状クッション)1の上部を接続する(図3(A))。なお、この段階で、シート状物1には、例えば、流体封止用配管15などの袋部11内に流体を供給する配管類を設置しておく。   The casing 21 is connected to an elevator 26 that moves up and down along a leader 23 that is supported upright by a base machine 22. First, the other end of the hoisting rope 25 whose one end is connected to the hoisting machine 24 is passed through the hollow portion of the casing 21 and the head is pushed out from the lower end of the casing 21. The upper part of the sheet-like material (the deflated bag-like cushion) 1 in which the bag portion 11 shown in FIG. 2 is deflated is connected to the end portion 251 of the hoisting rope (FIG. 3A). At this stage, the sheet-like material 1 is provided with piping for supplying fluid into the bag portion 11 such as the fluid sealing piping 15.

なお、シート状物をケーシング21に装着する際、不図示の外袋でシート状物1を包み込み、その後ケーシング21に入れ込んでもよい。外袋は、耐摩耗性を有する合成繊維又は天然繊維製のメッシュ材にて形成され、可撓性で且つ透水性を有するものが使用できる。また、外袋は、膨らんだ袋状クッション体1の外径とほぼ同一径の円筒形でよく、円筒形の両端面が開口したもの、上端面のみ開口したものなどが使用できる。円筒形の両端面が開口したものは、袋状クッション体1が抜けないよう開口部分に袋状クッション体1の外径より小さい径の環状金具などを装着することが好ましい。外袋は、ケーシング21を引上げる際、シート状物1とケーシング21内面の接触をさせないため、袋状クッション体1を防護し、地中に建て込まれた後は、土水圧に耐え得る補強材として機能する。従って、外袋は、シート状物1の袋部11に流体が供給され膨れた形状を包む容積を持つものである。   When the sheet-like material is mounted on the casing 21, the sheet-like material 1 may be wrapped with an unshown outer bag and then put into the casing 21. The outer bag may be formed of a mesh material made of synthetic fiber or natural fiber having wear resistance, and may be flexible and water permeable. Further, the outer bag may be a cylindrical shape having substantially the same diameter as the outer diameter of the inflated bag-like cushion body 1, and those having both ends of the cylinder opened and those having only the upper end opened may be used. It is preferable to attach an annular metal fitting having a diameter smaller than the outer diameter of the bag-like cushion body 1 to the opening portion so that the bag-like cushion body 1 does not come out. The outer bag prevents the sheet-like object 1 from contacting the inner surface of the casing 21 when the casing 21 is pulled up. Therefore, the outer bag protects the bag-like cushion body 1 and is reinforced to withstand soil water pressure after being built in the ground. Functions as a material. Therefore, the outer bag has a volume that encloses the swollen shape by supplying fluid to the bag portion 11 of the sheet-like material 1.

次いで、巻き上げ機24を稼動させ、巻き上げロープ25及びシート状物1を巻き上げる。これにより、シート状物1はケーシング21内に収容され、その後、ケーシング21の下端の開口は閉じられる(図3(B))。次いで、昇降機26をケーシング21との結合位置を変えつつ下降させ、ケーシング21を地中に貫入する(図3(C))。   Next, the hoisting machine 24 is operated to wind up the hoisting rope 25 and the sheet-like object 1. Thereby, the sheet-like object 1 is accommodated in the casing 21, and thereafter, the opening at the lower end of the casing 21 is closed (FIG. 3B). Next, the elevator 26 is lowered while changing the coupling position with the casing 21, and the casing 21 penetrates into the ground (FIG. 3C).

なお、振動遮断壁構築地盤としては、特に制限されず、軟弱地盤の場合は、そのまま、地盤に対して遮断壁を構築する。また、必要に応じて、遮断壁が構築される区域を、予め泥土地盤とすることもできる。これにより、貫入フレームなどの貫入体を地中に建て込み易くなる。なお、地盤中には、シート状物1を固定する地中アンカーを予め構築しておいてもよい。   In addition, it does not restrict | limit especially as a vibration isolation wall construction ground, In the case of a soft ground, a cutoff wall is constructed with respect to the ground as it is. In addition, if necessary, the area where the barrier wall is constructed can be previously set as a mud land. Thereby, it becomes easy to install penetration bodies, such as a penetration frame, in the ground. In the ground, an underground anchor for fixing the sheet-like object 1 may be constructed in advance.

第1の工程において、シート状物1は上記形態に限定されず、例えば、袋部11内に、オブラートに包んだドライアイスを予め充填させておいてもよい。オブラートは、ケーシング21にシート状物1を装填してから、地中に設置されるまでの間にドラアイスが蒸散しないようにするものである。ドライアイスの使用量は、シート状物1の袋部11の容積と袋部11が位置する地中の深度との関係で決定される。すなわち、シート状物1の袋部11の容積がそれぞれ同じである場合、地中の深度が深くなるほど、ドライアイスの充填量を多くする。これにより、各袋部の内圧を、地中の深度が深くなるほど高くなる土水圧に応じた圧にすることができ、深度方向に拘わらず袋状クッションをほぼ同じ体積を保持して地盤中に埋設させることができる。   In the first step, the sheet-like material 1 is not limited to the above-described form. For example, the bag part 11 may be preliminarily filled with dry ice wrapped in an wafer. The oblate prevents the Dora ice from evaporating between the time when the sheet-like material 1 is loaded in the casing 21 and the time it is installed in the ground. The amount of dry ice used is determined by the relationship between the volume of the bag portion 11 of the sheet-like material 1 and the depth of the ground where the bag portion 11 is located. That is, when the volume of the bag portion 11 of the sheet-like material 1 is the same, the filling amount of dry ice is increased as the depth in the ground increases. Thereby, the internal pressure of each bag part can be made into the pressure according to the earth and water pressure which becomes so high that the depth in the ground becomes deep, and the bag-like cushion is kept in the ground while maintaining almost the same volume regardless of the depth direction. Can be buried.

第2工程は、地盤中の複数の萎んだ袋状クッション体の袋部11の内部に流体を充填又は充満させる工程である。使用される流体としては、空気などの気体または水などの液体であり、この中、空気が好適である。以下、便宜上、流体を気体として説明する。
第2工程において、萎んだシート状物(袋状クッション体)1の袋部11の内部に気体を充填する方法としては、シート状物1の各袋部11を深度方向に連通する逆止弁付き連通短管14に、気体封止用配管15を、その先端151が最深部の袋部11a内に位置するように串刺し状に設置し、気体封止用配管15を最深部の袋部11aから上方の袋部11b、11cへ順に移動させながら、各袋部に所定の圧となる気体を封入していく方法が挙げられ、萎んだシート状物(袋状クッション体)1の袋部11の内部に気体を充満させる方法としては、袋部11内に充填されたオブラートに包まれたドライアイスが、地中に設置後、蒸散して袋部11内を炭酸ガスで充満させる方法である。ケーシング21にシート状物1を装填してから、地中に設置されるまでの間は、ドライアイスはオブラートに包まれているため、実質的に蒸散することはない。
The second step is a step of filling or filling the inside of the bag portion 11 of the plurality of deflated bag-like cushion bodies in the ground. The fluid used is a gas such as air or a liquid such as water. Of these, air is preferred. Hereinafter, for convenience, the fluid will be described as a gas.
In the second step, as a method of filling the inside of the bag part 11 of the deflated sheet-like object (bag-like cushion body) 1, a check valve that communicates each bag part 11 of the sheet-like object 1 in the depth direction. A gas sealing pipe 15 is installed on the attached short communication pipe 14 in a skewer shape so that the tip 151 is located in the deepest bag part 11a, and the gas sealing pipe 15 is connected to the deepest bag part 11a. There is a method in which a gas having a predetermined pressure is sealed in each bag portion while sequentially moving from the bag portion 11b to the upper bag portion 11c, and the bag portion 11 of the deflated sheet-like object (bag-like cushion body) 1 is mentioned. As a method of filling the inside of the gas with the gas, the dry ice wrapped in the oblate filled in the bag part 11 is transpired after being installed in the ground, and the bag part 11 is filled with carbon dioxide gas. . Since the dry ice is wrapped in the wafer from when the sheet-like material 1 is loaded into the casing 21 until it is installed in the ground, it does not substantially evaporate.

串刺し状の気体封止用配管15を使用した充填方法を簡略図である図4を参照して説明する。串刺し状の気体封止用配管15は、その先端151が最深部の袋部11a内に位置するようにし、基端152が地上の気体供給手段18に接続される。気体封止用配管15の地上側部には、圧力計17が設置されている。気体封止用配管15は、シート状物1に対して、串刺し状であっても各袋部11間は気密状態であり、また、気体封止用配管15は、連通短管14内を地表方向に対して移動自在である。   A filling method using the skewered gas sealing pipe 15 will be described with reference to FIG. 4 which is a simplified diagram. The skewered gas sealing pipe 15 has a distal end 151 positioned in the deepest bag portion 11a and a base end 152 connected to the ground gas supply means 18. A pressure gauge 17 is installed on the ground side of the gas sealing pipe 15. Even if the gas sealing pipe 15 is skewered with respect to the sheet-like material 1, the air bag 15 is hermetically sealed, and the gas sealing pipe 15 is connected to the surface of the short communication pipe 14. It is movable with respect to the direction.

先ず、図4(A)に示すように、串刺し状の気体封止用配管15の先端151が最深部の袋部11a内に位置する状態において、圧縮機などの気体供給手段18から圧縮気体が最深部の袋部11aに供給される。圧縮気体(空気)は、袋部11aの内圧(Pa)が、当該位置にある土水圧(拘束圧)と同程度又はそれよりやや高めになるまで供給される。次いで、串刺し状の気体封止用配管15を、その先端151が、最深部の袋部11aよりひとつ地表側にある袋体11b内に位置するように、引上げる。そして、圧縮気体(空気)が、袋部11bの内圧(Pb)が、当該位置にある土水圧(拘束圧)と同程度又はそれよりやや高めになるまで供給される(図4(B))。次いで、串刺し状の気体封止用配管15を、その先端151が、袋部11bの地表側にある袋体11c内に位置するように引上げる。そして、圧縮気体(空気)が、袋部11cの内圧(Pc)が、当該位置にある土水圧(拘束圧)と同程度又はそれよりやや高めになるまで供給される(不図示)。さらに袋部11を備える場合、以下、同様の方法で袋部11内に気体が充填される。これにより、シート状物1の袋部11の全てが気体により膨らみ、且つPa>Pb>Pc・・となる(図3(D))。なお、横置き形態であって、深度方向に多数の袋部が存在する場合、近接する2つ又は3つなどが同じ内圧となってもよい。これにより、地中の深度が深くなるほど高くなる土水圧に応じた圧にすることができ、深度方向に拘わらず袋状クッションをほぼ同じ体積を保持して地盤中に埋設させることができるため、地盤の上下方向の全域において所望の地盤振動遮断効果が得られる。   First, as shown in FIG. 4A, in a state where the tip 151 of the skewered gas sealing pipe 15 is located in the deepest bag portion 11a, the compressed gas is supplied from the gas supply means 18 such as a compressor. It is supplied to the deepest bag part 11a. The compressed gas (air) is supplied until the internal pressure (Pa) of the bag portion 11a is approximately the same as or slightly higher than the soil water pressure (restraint pressure) at the position. Next, the skewered gas sealing pipe 15 is pulled up so that the tip 151 of the skewered gas sealing pipe 15 is located in the bag body 11b on the ground surface side from the deepest bag part 11a. Then, the compressed gas (air) is supplied until the internal pressure (Pb) of the bag portion 11b becomes approximately the same as or slightly higher than the soil water pressure (restraint pressure) at the position (FIG. 4B). . Next, the skewered gas sealing pipe 15 is pulled up so that the tip 151 is located in the bag body 11c on the ground surface side of the bag portion 11b. Then, the compressed gas (air) is supplied until the internal pressure (Pc) of the bag portion 11c becomes approximately the same as or slightly higher than the soil water pressure (restraint pressure) at the position (not shown). When the bag portion 11 is further provided, the bag portion 11 is filled with gas in the same manner. Thereby, all of the bag portions 11 of the sheet-like material 1 are inflated by the gas, and Pa> Pb> Pc... (FIG. 3D). In addition, when it is a horizontal installation form and there are many bag parts in the depth direction, two or three adjacent to each other may have the same internal pressure. Thereby, it can be made a pressure according to the soil water pressure that becomes higher as the depth in the ground becomes deeper, and the bag-like cushion can be embedded in the ground while maintaining almost the same volume regardless of the depth direction. A desired ground vibration isolation effect can be obtained in the entire area in the vertical direction of the ground.

ドライアイスを充填材として使用する場合、第2工程においては、気体封止用配管15は不要であり、後述する圧力監視手段で、袋部11内の圧力を監視するだけでよい。ドライアイスの量は、蒸散した炭酸ガスが、それぞれの袋部11の内圧が、当該位置にある土水圧(拘束圧)と同程度又はそれよりやや高めになるように予め決定しておく。これにより、串刺し状の気体封止用配管15を使用した場合と同様の効果を奏する。   When dry ice is used as a filler, the gas sealing pipe 15 is not necessary in the second step, and it is only necessary to monitor the pressure in the bag portion 11 with the pressure monitoring means described later. The amount of dry ice is determined in advance so that the vaporized carbon dioxide gas has an internal pressure of each bag portion 11 that is approximately the same as or slightly higher than the soil water pressure (restraint pressure) at that position. Thereby, there exists an effect similar to the case where the skewered gas sealing pipe | tube 15 is used.

他の気体充填方法を図5を参照して説明する。図5(B)は図5(A)の側面図である。図5において、地中のシート状物1の9つの袋部11には、それぞれ圧力計54付きの気体供給配管55が接続されており、他端は、気体供給手段18に接続されている。符号56はアンカー、符号59は泥水地盤である。そして、圧縮気体(空気)を、袋部11の内圧(Px(xは1〜9の整数))が、当該位置にある土水圧(拘束圧)と同程度又はそれよりやや高めになるまでそれぞれに応じて供給される。これにより、串刺し状の気体封止用配管15を使用した場合と同様の効果を奏する。また、図5の気体充填方法であれば、袋部11内を膨らませた後は、各袋部11内の圧力を個別に監視することができる点で好適である。なお、シート状物1は、複数の子シート状物を連結して一体化した所謂ユニット物とすることができる。ユニット物は、例えば図5のシート状物1の場合、上方の3つの袋部11を有する上方ユニットと、中央の3つの袋部11を有する中央ユニットと、下方の3つの袋部11を有する下方ユニットとした場合、各ユニットの袋部は連通孔で連通し、同じユニット内ではそれぞれの袋部11の内圧を同じ圧力としてもよい。これにより、圧力計54付きの気体供給配管55の設置を省略することができる。   Another gas filling method will be described with reference to FIG. FIG. 5B is a side view of FIG. In FIG. 5, a gas supply pipe 55 with a pressure gauge 54 is connected to each of the nine bag portions 11 of the underground sheet 1, and the other end is connected to the gas supply means 18. Reference numeral 56 is an anchor, and reference numeral 59 is a muddy ground. Then, until the internal pressure (Px (x is an integer of 1 to 9)) of the bag portion 11 is the same as or slightly higher than the soil water pressure (restraint pressure) at the position, Supplied according to. Thereby, there exists an effect similar to the case where the skewered gas sealing pipe | tube 15 is used. Further, the gas filling method of FIG. 5 is preferable in that the pressure in each bag portion 11 can be individually monitored after the inside of the bag portion 11 is inflated. In addition, the sheet-like object 1 can be a so-called unit object in which a plurality of child sheet-like objects are connected and integrated. For example, in the case of the sheet-like material 1 of FIG. 5, the unit object has an upper unit having three upper bag parts 11, a central unit having three central bag parts 11, and three lower bag parts 11. When the lower unit is used, the bag portions of each unit communicate with each other through the communication hole, and the internal pressure of each bag portion 11 may be the same pressure within the same unit. Thereby, installation of the gas supply piping 55 with the pressure gauge 54 can be omitted.

第3工程は、ケーシング21である貫入体を地上に引上げて膨らませた複数の袋状クッション体1を地盤中に置き去りにする工程である。すなわち、昇降機26により、ケーシング21は地表に引上げられる。この際、ケーシング21と袋状クッション体1の連結部分は解除される。また、気体封止用配管15などの接続配管がケーシング21の引上げに障害となる場合は、これを取り外せばよく、また、この取り外しは、気体封止用配管15などの接続配管を再度設置するような取り外し方法が好適である。また、貫入体が、貫入フレームの場合も同様に、貫入フレームと袋状クッション体1の連結部分が解除され、従来の地中遮水壁構築方法の引き上げ工程に準じる方法で実施される。また、複数の袋状クッション体1を包んだ外袋を使用した場合、外袋は複数の袋状クッション体1と共に、地中に置き去りにされる。外袋は、地中に建て込まれた後は、土水圧に耐え得る補強材として機能する。   The third step is a step of leaving a plurality of bag-like cushion bodies 1 in which the penetrating body as the casing 21 is pulled up and inflated on the ground in the ground. That is, the casing 21 is pulled up to the ground surface by the elevator 26. At this time, the connection portion between the casing 21 and the bag-like cushion body 1 is released. Further, when the connection pipe such as the gas sealing pipe 15 becomes an obstacle to the lifting of the casing 21, it is only necessary to remove it, and this removal is performed by installing the connection pipe such as the gas sealing pipe 15 again. Such a removal method is suitable. Similarly, when the penetrating body is the penetrating frame, the connecting portion between the penetrating frame and the bag-like cushion body 1 is released, and the penetrating body is constructed by a method according to the pulling-up process of the conventional underground water barrier construction method. Moreover, when using the outer bag which wrapped the some bag-shaped cushion body 1, an outer bag is left in the ground with the several bag-shaped cushion body 1. FIG. The outer bag functions as a reinforcing material that can withstand earth water pressure after being built in the ground.

本発明の地盤振動遮断工法においては、上記第2工程と第3工程を逆にするようにしてもよい。すなわち、第1工程を行なった後、該貫入体を地上に引上げて複数の萎んだ袋状クッション体を地盤中に置き去りにする第2A工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填又は充満させる第3A工程を行なう工法である。第2A工程において、該貫入体を地上に引上げる方法は、膨らんだ袋状クッション体が、萎んだクッション体となっている以外は、前記第3工程と同様の方法で行うことができる。また、第3A工程において、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填又は充満させる方法は、貫入体が該袋状クッション体から外された状況において行なうこと以外は、前記第2工程と同様の方法で行うことができる。   In the ground vibration isolation method of the present invention, the second step and the third step may be reversed. That is, after performing the first step, the second A step of pulling up the penetrating body to the ground and leaving a plurality of deflated bag-shaped cushion bodies in the ground, and a plurality of deflated bag-shaped cushion bodies in the ground This is a method of performing the third A step of filling or filling a fluid inside. In the second step A, the method of pulling up the penetrating body can be performed in the same manner as in the third step, except that the inflated bag-like cushion body is a deflated cushion body. Further, in the step 3A, the method of filling or filling the fluid in the plurality of deflated bag-like cushion bodies in the ground is performed in the situation where the penetrating body is removed from the bag-like cushion body, It can carry out by the method similar to a 2nd process.

なお、ドライアイスを使用する場合は、ドライアイスの蒸散が第2A工程から始まっていてもよい。すなわち、第1工程の後、該貫入体を地上に引上げて複数の萎んだ袋状クッション体を地盤中に置き去りにすると共に、地盤中の複数の萎んだ袋状クッション体の内部にドライアイスを充満させる第2B工程を行なうこととなる。   In addition, when using dry ice, transpiration of dry ice may be started from the 2nd A process. That is, after the first step, the penetrating body is pulled up to the ground to leave a plurality of deflated bag-shaped cushion bodies in the ground, and dry ice is put inside the plurality of deflated bag-shaped cushion bodies in the ground. The 2B process to be filled will be performed.

また、図5(B)に示すように、一つのシート状物1で構築された遮断壁1Aは、振動の振源地60から見て、クッション体非存在部57を有する。このため、遮断壁1Aに隣接し、遮断壁1Aのクッション体非存在部57に袋状クッション体が対向するように、深度方向の位相をずらして更に、遮断壁1Bを構築する。図5の地盤振動遮断壁10は遮断壁1Aと遮断壁1Bから形成される。なお、袋状クッション体1の配列形態は種々あり、その例示を以下に示す。   Further, as shown in FIG. 5B, the blocking wall 1 </ b> A constructed by one sheet-like object 1 has a cushion body non-existing portion 57 when viewed from the vibration source 60. For this reason, the blocking wall 1B is further constructed by shifting the phase in the depth direction so that the bag-like cushion body faces the cushion wall non-existing portion 57 of the blocking wall 1A adjacent to the blocking wall 1A. The ground vibration blocking wall 10 of FIG. 5 is formed of a blocking wall 1A and a blocking wall 1B. There are various arrangement forms of the bag-like cushion body 1, and examples thereof are shown below.

図6(A)〜(E)は縦置き形態における袋状クッション体1の上下方向の配列形態を示す図である。図6(A)は前記の実施の形態で適用した形態であり、複数の袋状クッション体1が上下方向に1列に配置された形態である。図6(B)は、上下方向に一列配列された袋状クッション体1が3組三角形状に近接配置された形態である。図6(C)は、上下方向に1列配列され、且つ、上下方向に隣接する袋状クッション体1同士が離間された形態である。図6(D)は上下方向に一列配列された袋状クッション体1が3組水平方向に一直線上に密接に配置された形態である。図6(E)は、上下方向に1列に配列された袋状クッション体1と、この一列の袋状クッション体1の左右に2つの袋状クッション体1が隣接配置されたパターンである。   6 (A) to 6 (E) are diagrams showing the vertical arrangement of the bag-like cushion bodies 1 in the vertical placement form. FIG. 6 (A) is a form applied in the above-described embodiment, and is a form in which a plurality of bag-like cushion bodies 1 are arranged in a line in the vertical direction. FIG. 6B shows a form in which the bag-like cushion bodies 1 arranged in a line in the vertical direction are arranged close to each other in three sets of triangles. FIG. 6C shows a form in which the bag-like cushion bodies 1 arranged in a line in the vertical direction and adjacent in the vertical direction are separated from each other. FIG. 6D shows a form in which three sets of bag-like cushion bodies 1 arranged in a line in the vertical direction are closely arranged in a straight line in the horizontal direction. FIG. 6E shows a pattern in which the bag-like cushion bodies 1 arranged in a line in the vertical direction and two bag-like cushion bodies 1 are arranged adjacent to each other on the left and right sides of the one-line bag-like cushion body 1.

図7(A)〜(E)は縦置き形態における地盤振動遮断壁の上方から見た配置形態を示す図である。振動の振源地は、図7の上方又は下方である。図7(A)の地盤振動遮断壁10Aは複数の袋状クッション体1が2列状に隙間無く密接して配置された形態である。図7(B)の地盤振動遮断壁10Bは複数の袋状クッション体1が互いに所定の隙間をあけて配置された形態である。図7(C)の地盤振動遮断壁10Cは複数の袋状クッション体1が各列でシフトして3列状とし隙間無く密接して配置された形態である。図7(D)の地盤振動遮断壁10Dは複数の袋状クッション体1が1列に隙間無く密接して配置された形態である。図7(E)の地盤振動遮断壁10Eは1列に密接に配置された複数の袋状クッション体1によって1つのブロックを構成し、このブロックを袋状クッション体1の幅だけ交互にシフトさせて配置された形態である。   7 (A) to 7 (E) are views showing an arrangement form seen from above the ground vibration isolation wall in the vertical installation form. The source of vibration is above or below in FIG. The ground vibration isolation wall 10A in FIG. 7A is a form in which a plurality of bag-like cushion bodies 1 are closely arranged in two rows without a gap. The ground vibration isolation wall 10B of FIG. 7B is a form in which a plurality of bag-like cushion bodies 1 are arranged with a predetermined gap therebetween. The ground vibration isolation wall 10C shown in FIG. 7C is a form in which a plurality of bag-like cushion bodies 1 are shifted in each row to form three rows and are closely arranged without a gap. The ground vibration isolation wall 10D of FIG. 7D is a form in which a plurality of bag-like cushion bodies 1 are arranged closely in a line without any gap. The ground vibration isolation wall 10E shown in FIG. 7E constitutes one block by a plurality of bag-like cushion bodies 1 closely arranged in one row, and these blocks are alternately shifted by the width of the bag-like cushion body 1. Are arranged.

図8(A)〜(D)は縦置き形態における袋状クッション体1の上下方向の配列形態を示す図である。図8(A)は複数の袋状クッション体1が上下方向に1列に配置された形態である。図8(B)は、上下方向に1列配列された袋状クッション体1が3組に近接配置された形態である。図8(C)は、上下方向に一列配列され、且つ、上下方向に隣接する袋状クッション体1同士が離間された形態である。図8(D)は上下方向に1列配列された袋状クッション体1が3組水平方向に一直線上に密接に配置された形態である。   FIGS. 8A to 8D are views showing the vertical arrangement of the bag-like cushion body 1 in the vertical configuration. FIG. 8A shows a form in which a plurality of bag-like cushion bodies 1 are arranged in a line in the vertical direction. FIG. 8B shows a form in which three pairs of bag-like cushions 1 arranged in a vertical direction are arranged close to each other. FIG. 8C shows a form in which the bag-like cushion bodies 1 arranged in a line in the vertical direction and adjacent in the vertical direction are separated from each other. FIG. 8D shows a form in which three sets of bag-like cushion bodies 1 arranged in a row in the vertical direction are closely arranged in a straight line in the horizontal direction.

図9(A)〜(D)は横置き形態における地盤振動遮断壁10の上方から見た配置形態を示す図である。振動の振源地は、図9の上方又は下方である。図9(A)の地盤振動遮断壁10Fは複数の袋状クッション体1が2列状に隙間無く密接して配置された形態である。図9(B)の地盤振動遮断壁10Gは複数の袋状クッション体1が4列状で互いにシフトして隙間無く密接して配置された形態である。図9(C)の地盤振動遮断壁10Hは複数の袋状クッション体1が一列且つ水平方向に隙間無く密接して配置された形態である。図9(D)の地盤振動遮断壁10Iは複数の袋状クッション体1が3列且つ水平方向に隙間無く密接して配置された形態である。   FIGS. 9A to 9D are views showing an arrangement form seen from above the ground vibration isolation wall 10 in the horizontal installation form. The source of vibration is above or below in FIG. The ground vibration isolation wall 10F in FIG. 9A is a form in which a plurality of bag-like cushion bodies 1 are closely arranged in two rows without a gap. The ground vibration isolation wall 10G in FIG. 9B is a form in which a plurality of bag-like cushion bodies 1 are arranged in four rows and are closely arranged with no gaps. The ground vibration isolation wall 10H of FIG. 9C is a form in which a plurality of bag-like cushion bodies 1 are arranged in close contact with each other in a row and in the horizontal direction. The ground vibration isolation wall 10I in FIG. 9D is a form in which a plurality of bag-like cushion bodies 1 are arranged in close contact with each other in three rows and in the horizontal direction.

本発明の地盤振動遮断工法で構築された地盤振動遮断壁には、複数の袋状クッション体の圧力を地中に構築後も調整可能な圧力調整手段を設置することができる。これにより、長期に安定した地盤振動遮断壁とすることができる。   The ground vibration isolation wall constructed by the ground vibration isolation method of the present invention can be provided with a pressure adjusting means capable of adjusting the pressures of the plurality of bag-like cushion bodies even after construction in the ground. Thereby, it can be set as the ground vibration isolation wall stabilized for a long term.

また、本発明の地盤振動遮断工法で構築された地盤振動遮断壁は、各袋部の内圧が、地中の深度が深くなるほど高くなる土水圧に応じた圧になっているため、深度方向に拘わらず袋状クッションをほぼ同じ体積を保持して地盤中に埋設させることができる。このため、地盤の上下方向の全域において所望の地盤振動遮断効果が得られる。   In addition, the ground vibration isolation wall constructed by the ground vibration isolation method of the present invention is such that the internal pressure of each bag portion is a pressure corresponding to the soil water pressure that increases as the depth in the ground increases, so in the depth direction Regardless, the bag-like cushion can be embedded in the ground while maintaining substantially the same volume. For this reason, a desired ground vibration isolation effect can be obtained in the entire region in the vertical direction of the ground.

本例の萎んだ袋状クッション体の横置きの形態を示す図。The figure which shows the form of horizontal placement of the deflated bag-shaped cushion body of this example. 本例の萎んだ袋状クッション体の横置きの形態を示す図。The figure which shows the form of horizontal placement of the deflated bag-shaped cushion body of this example. 図2のシート状物をケーシングに装着して施工する方法を説明する図。The figure explaining the method of mounting | wearing and installing the sheet-like material of FIG. 串刺し状の気体封止用配管を使用した充填方法を説明する図。The figure explaining the filling method which uses skewered gas sealing piping. 他の気体充填方法を説明する図。The figure explaining other gas filling methods. 縦置き形態における袋状クッション体の上下方向の配列形態を示す図。The figure which shows the arrangement | sequence form of the up-down direction of the bag-shaped cushion body in a vertical installation form. 縦置き形態における地盤振動遮断壁の上方から見た配置形態を示す図。The figure which shows the arrangement | positioning form seen from the upper direction of the ground vibration isolation | separation wall in a vertical installation form. 横置き形態における袋状クッション体の上下方向の配列形態を示す図。The figure which shows the arrangement | sequence form of the up-down direction of the bag-shaped cushion body in a horizontal installation form. 横置き形態における地盤振動遮断壁の上方から見た配置形態を示す図。The figure which shows the arrangement | positioning form seen from the upper direction of the ground vibration isolation wall in a horizontal installation form.

符号の説明Explanation of symbols

1 袋状クッション体
10、10A〜10I 地盤振動遮断壁
11、11a〜11c 袋部
14 逆止弁付き連通短管
15 流体封止用配管
17 圧力計
18 流体供給手段
21 ケーシング
24 巻き上げ機
DESCRIPTION OF SYMBOLS 1 Bag-shaped cushion body 10, 10A-10I Ground vibration isolation wall 11, 11a-11c Bag part 14 Short communication tube with check valve 15 Fluid sealing piping 17 Pressure gauge 18 Fluid supply means 21 Casing 24 Winding machine

Claims (6)

複数の袋状クッション体を地盤中に埋設する工法であって、貫入体に装着された萎んだ複数の袋状クッション体を、該貫入体と共に地盤中に連行する第1工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる第2工程と、該貫入体を地上に引上げて膨らませた複数の袋状クッション体を地盤中に置き去りにする第3工程を行なう工法であって、
前記地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる方法は、前記袋状クッション体の各袋部を深度方向に連通する逆止弁付き連通孔又は連通短管に、気体封止用配管を、その先端が最深部の袋部内に位置するように串刺し状に設置し、該気体封止用配管を該最深部の袋部から上方の袋部へ順に移動させながら、各袋部に所定の圧となる気体を封入していくことを特徴とする地盤振動遮断工法。
A method of embedding a plurality of bag-like cushion bodies in the ground, the first step of entraining a plurality of deflated bag-like cushion bodies attached to the penetration body together with the penetration body in the ground, In a method of performing a second step of filling a plurality of deflated bag-like cushion bodies with fluid and a third step of leaving the plurality of bag-like cushion bodies inflated by pulling up the penetration body on the ground. There,
In the method of filling a plurality of deflated bag-shaped cushion bodies in the ground with a fluid, a gas is introduced into a communication hole or a communication short pipe with a check valve that communicates each bag portion of the bag-shaped cushion body in the depth direction. While placing the sealing pipe in a skewered manner so that the tip is located in the deepest bag part, each gas sealing pipe is moved in order from the deepest bag part to the upper bag part, A ground vibration isolation method characterized in that a gas having a predetermined pressure is sealed in the bag portion.
複数の袋状クッション体を地盤中に埋設する工法であって、貫入体に装着された萎んだ複数の袋状クッション体を、該貫入体と共に地盤中に連行する第1工程と、該貫入体を地上に引上げて複数の萎んだ袋状クッション体を地盤中に置き去りにする第2A工程と、地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる第3A工程を行なう工法であって、
前記地盤中の複数の萎んだ袋状クッション体の内部に流体を充填させる方法は、前記袋状クッション体の各袋部を深度方向に連通する逆止弁付き連通孔又は連通短管に、気体封止用配管を、その先端が最深部の袋部内に位置するように串刺し状に設置し、該気体封止用配管を該最深部の袋部から上方の袋部へ順に移動させながら、各袋部に所定の圧となる気体を封入していくことを特徴とする地盤振動遮断工法。
A method of embedding a plurality of bag-like cushion bodies in the ground, the first step of entraining a plurality of deflated bag-like cushion bodies attached to the penetration body into the ground together with the penetration body, and the penetration body In the method of performing the 2A process of pulling up the ground to leave a plurality of deflated bag-like cushion bodies in the ground, and the third A process of filling a plurality of deflated bag-shaped cushion bodies in the ground with fluid. There,
In the method of filling a plurality of deflated bag-shaped cushion bodies in the ground with a fluid, a gas is introduced into a communication hole or a communication short pipe with a check valve that communicates each bag portion of the bag-shaped cushion body in the depth direction. While placing the sealing pipe in a skewered manner so that the tip is located in the deepest bag part, each gas sealing pipe is moved in order from the deepest bag part to the upper bag part, A ground vibration isolation method characterized in that a gas having a predetermined pressure is sealed in the bag portion.
前記複数の袋状クッション体が埋設される予定地盤を、予め泥水地盤とする前工程を更に行なうことを特徴とする請求項1又は2に記載の地盤振動遮断工法。 The ground vibration isolation method according to claim 1 or 2 , further comprising performing a pre-process in which the planned ground in which the plurality of bag-like cushion bodies are embedded is previously muddy ground. 前記萎んだ袋状クッション体は、2枚のシートを袋部となる部分を残して溶着したシート状物であることを特徴とする請求項1〜のいずれか1項に記載の地盤振動遮断工法。 The ground vibration isolation device according to any one of claims 1 to 3 , wherein the deflated bag-like cushion body is a sheet-like material in which two sheets are welded so as to leave a portion that becomes a bag portion. Construction method. 前記貫入体は、貫入フレームか、あるいはケーシングであることを特徴とする請求項1〜のいずれか1項に記載の地盤振動遮断工法。 The ground vibration isolation method according to any one of claims 1 to 4 , wherein the penetration body is a penetration frame or a casing. 前記貫入体はケーシングであって、前記第1工程は、前記萎んだ袋状クッション体を包む外袋を該ケーシングに装着し、該萎んだ袋状クッション体を包む外袋ごと、地盤中に連行することを特徴とする請求項に記載の地盤振動遮断工法。 The penetrating body is a casing, and in the first step, an outer bag that wraps the deflated bag-shaped cushion body is attached to the casing, and the outer bag that wraps the deflated bag-shaped cushion body is entrained in the ground. The ground vibration isolation method according to claim 5 , wherein:
JP2007034317A 2007-02-15 2007-02-15 Ground vibration isolation method Expired - Fee Related JP4823939B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007034317A JP4823939B2 (en) 2007-02-15 2007-02-15 Ground vibration isolation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007034317A JP4823939B2 (en) 2007-02-15 2007-02-15 Ground vibration isolation method

Publications (2)

Publication Number Publication Date
JP2008196251A JP2008196251A (en) 2008-08-28
JP4823939B2 true JP4823939B2 (en) 2011-11-24

Family

ID=39755441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007034317A Expired - Fee Related JP4823939B2 (en) 2007-02-15 2007-02-15 Ground vibration isolation method

Country Status (1)

Country Link
JP (1) JP4823939B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2642031B1 (en) * 2012-03-22 2019-07-10 Keller Holding GmbH Method of producing a protection assembly for protecting against tremors in the ground and device for same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2533701B2 (en) * 1991-07-08 1996-09-11 株式会社奥村組 How to build the structure of the isolation wall
JP2641415B2 (en) * 1995-09-14 1997-08-13 株式会社奥村組 Structure of damping wall
JPH09241953A (en) * 1996-03-06 1997-09-16 Washi Kosan Kk Baggy member
JP3580401B2 (en) * 1998-03-30 2004-10-20 住友ゴム工業株式会社 Packaging method for hard tennis balls
JP2004322204A (en) * 2003-04-28 2004-11-18 Naoyuki Okagawa Dry ice type internal high-pressure endurance reinforced steel pipe
JP4468138B2 (en) * 2004-10-21 2010-05-26 株式会社不動テトラ Ground vibration isolation structure and ground vibration isolation method
JP4459021B2 (en) * 2004-11-04 2010-04-28 株式会社不動テトラ Ground displacement suppression device
JP2006183233A (en) * 2004-12-24 2006-07-13 Asahi Kasei Construction Materials Co Ltd Method for rotatively burying pile with concrete spiral protrusion

Also Published As

Publication number Publication date
JP2008196251A (en) 2008-08-28

Similar Documents

Publication Publication Date Title
CN102803617B (en) For reducing equipment and the method for noise
EP3259403B1 (en) Improved containment dike
KR101234814B1 (en) Multi pipe grouting unit and method for reinforcing tunnel using thereof
JP4823939B2 (en) Ground vibration isolation method
JP5231889B2 (en) Method for protecting hole wall of cast-in-place pile
JP5198992B2 (en) Ground injection device and ground improvement method using the same
US6651394B2 (en) Apparatus for use in the construction of precast, moment-resisting frame buildings
JP4989266B2 (en) Embankment construction apparatus and embankment construction method
CN211666686U (en) Packer and well structure for independent disposal of multiple layers of underground water
JP2010037792A (en) Construction method for pushing up structure
JP4468138B2 (en) Ground vibration isolation structure and ground vibration isolation method
JP4115899B2 (en) Structure construction method and bag used therefor
JP4888293B2 (en) Earth retaining wall made of parent pile sheet pile, water stop structure of earth retaining wall made of parent pile side sheet pile, construction method of earth retaining wall made of parent pile side sheet pile, and retaining wall of earth retaining wall made of parent pile side sheet pile Water method
JP6773838B2 (en) Hollow columnar reinforcement method and hollow columnar reinforcement material used for this
JP2001131953A (en) Injection pipe device and ground-injecting method
JP2006022551A (en) Continuous underground wall and earth retaining method
JPH09144000A (en) Method and device for retaining earth
JP6022404B2 (en) Caisson groundwater flow suppression structure and groundwater flow suppression method
CN217811066U (en) Electric power foundation pit protecting wall
JP2013100695A (en) Bag body for mortar filling, liner plate, and shaft construction method
JP2002004287A (en) Bag body for constructing wall face and earth wall construction method using the same
JPH07197442A (en) Soil improvement method
JP3746274B2 (en) How to build the bottom of underground structures
WO2008023987A1 (en) A method, kit and device for installation of an inflatable sub sea structure
JPS6153919A (en) Method of sealing foundation of joined steel pipe caisson

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100106

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110411

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110419

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110525

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110705

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110728

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110906

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110907

R150 Certificate of patent or registration of utility model

Ref document number: 4823939

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140916

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees